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Ronald and Tim did their laundry today. Ronald does laundry every 6 days and Tom does laundry every 9 days. How many days will it be until Ronald and Tim do their laundry on the same day again?
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Ronald and Tim did their laundry today. Ronald does laundry every 6 days and Tom does laundry every 9 days. How many days will it be until Ronald and Tim do their laundry on the same day again?

User Francoiskroll
by
8.5k points

1 Answer

5 votes
least common multiple question

Ronald: count by 6's
6, 12, 18, 24, 30, 36, 42, 48, 54 ....

Tim: count by 9's
9, 18, 27, 36, 45, 54,

every 18 days they do their laundry together
User Tyler Hackbart
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7.1k points
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